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Letter from Arno B. Cammerer to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from A. E. Demaray to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from Ed Hamilton to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Proposed admission fees to Grand Canyon National Park.
Letter from Arno B. Cammerer to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from Arno B. Cammerer to J. R. Eakin describing the procedure for purchasing Bright Angel Trail.
Four letters of correspondence about the purchase of Bright Angel Trail between A. E. Demaray, Acting Director of the Grand Canyon National Park; E. C. Finney, Department of the Interior First Assistant Secretary; Carl T. Hayden, Representative (AZ); and Stephen T. Mather, Director of the National Park Service.